Locking device for demountable rims



H. W.,MAR.TIN AND L. CALHOUN.

LOCKING DEVICE FOR DEMOUNTABLE RIMS.

APPLICAT ION FILED MAR. 30' 1922.

Z 2. 9 1T n. 1H .4 w n AH. m t H .w a P attoznzgd H W. MARTIN AND L. M. CALHOUN.

LOCKING DEVICE FOR DEMOUNTABLE RIMS.

APPLICATION FILED MAR. 30. 1922.

Pa' tented Aug. 1,1922.

2 SHEETS-SHEET 2.

Ta: Z2 1 4 /4 A gmenl'ow 20 7f Z0. may/Z030 12778. Calhoun?) HARRY WALTER MARTIN AND LANNIE MORRIS CALHOUN, 0F GILBERT, LOUISIANA.

LOGKING DEVICE FOR DEMOUNTABLE RIMS;

Specification ofLetters Patent.

Patented Aug. 1, 1922..

Application filed March 30, 1922. Serial No. 548,151.

to which it appertains to make and use the same.

The present invention relates to improvements in looking devices for demou-ntable rims and aims to provide a compact structure doing away with the use of'the lugs now employed for this purpose which must be separately handled and whlch leave gaps therebetwe'en where the rim is not supported and held fast.

An object of the invention is to provide for the continuous support of the demount able rim at its outer side and to form an efl'eetive lock which will be constituted of few parts. will be relatively inexpensive to rminu'liacture, and willbe such as to be applicable to standard wheels and rims and which may be operated with ease and quick ness. I I

With the foregoing and other objects in view. the invention will be more fully described hereinafter. and will be more particul'ary pointed out in the claims appended hereto.

In Hie-drawings. wherein like symbols refer to like or corresponding partsthrou-ghout the several views,

Fig. l is a side view of a wheel shown equipped with adevice according to the present invention;

Fig.2 is a cross sectional view on an; en

larged scale of the telly and latchbolt;

Fig. 8 is a cross section taken on the line 33 also in Fig. 1';

line' l talso in Fig. 1.;

Fig. 5 is a perspective view of the latch bolt; i I

Fig. 6 is a horizontal section taken on the line 66 in Fig. 2'; l p

Fig. '7 is a fragmentary perspective view of the locking ring;

Fig. 8 is a similar view on an enlarged scale showing the formation of the notches;

Fig. 4c is a similar section taken on the proved catch.

Fi 9is an end view of the latch bolt with the spring in operative position; I

Fig. 10' is a similar view with the spring removed from the catch; and,

Fig. 11 is a perspective View of the im- Referring more particularly to the drawings, l indicatesgener'ally a wheel and 2 the telly extending thereabout. The usual telly band is indicatedat 3 and is provided with an outturned flange 4; at the inner side of the wheel against which is thrust the inner side of the clemountable rim 5' which carries the tire 6. Lugs are usually employed at the other side of the demountable rim 5' to hold it in place on the wheeLbut in this instance, such lugs are dispensed with and a'continuous annular ring 7 is employed having a vertical flange 8 to' take against the outer side of the outer flange of the demountable rim 5 and also having a second flange 9 adapted to fit within the space between the telly band 3 and demountable rim and having a wedge on the inclined upper face in order to force the demountable rim 5 outwardly. This ring 7- is provided with notches 10' on its inner side at suitable intervals apart in order to enable the ring to clear the heads" 11 of bolts 12 which fit transversely through the telly 2. These bolts are held in" any appropriate manner as for instance by the use oi nuts 13 threaded upon reduced screu' -threaded tenons ltprojecting from the inner side thereof, the bolts preferably having the configu-ration shownin-Fig. 5; or some other appropriate configuration to aroid'their accidental turning in the telly. The outwardly projecting heads 11 of the bolts are provided with under-cutslot's 15 to: receive thewedges 16 carried by the outer sideyofa locking ring 7 The outer inclined walls of the wedgeltl are adapted to engage against the base walls of the slots'1 5 and cause the-ring 7 to berforced inwardly into One or all of thewedgeslfi are provided with a series of notches as illustrated 111+ Figs. 7 and 8 the notches having abrupt or straight walls 17 at one side and inclined walls 18-extending from the innermost edges of the abrupt wall 17 and tapering off into. the: inner surface of the" wedges. These notches are adapted to cooperate with a beveled tooth 19 carried. by a catch 20 which is pivoted upon a pin 21 mounted through the slotted portion 22 on one of the bolts 12. The slotted portion extends through both sides of the bolt and exposes for operation a sprin 23 which is provided with an out turned handle portion 2a for this purpose.

The spring is wound at-its intermediate portion as indicated at 25 about the pin 21, the convolution 25 being situated within a cutout portion 26 of the .catch. The end 27 of the spring may be anchored in the side wall of the bolt while the opposite portion of the spring which is the handle 24; is rounded and engages beneath the rounded under portion of the catch 20.

In the operation of the device, the de mountable rim 5 having been put in place upon the wheel with its inner side engaging the flange a of the felly band 3, the locking ring 7 is now slipped over the bolts 11, the notches 10 being brought to a correct position for this operation, and the flange 9 is fitted between the folly band andrim. The ring 7 is then turned by the use of an appropriate tool causing the small ends ofrthe wedges to approach and enter the slots in the bolt heads 11.. progresses, the inclinedouter faces of the wedges will slide in contact with the edges of the base walls 15 and result in the forcing of the ring 7. as a whole inwardly into the position shown in Figs. 3 and l.

The catch will not interfere with the movement of the ring in this direction due to the inclined side of the tooth 19, but the abrupt walls 17 of the notches in the wedges 16 will catch behind the tooth and prevent the slipping of the ring back in the opposite direction. The inclined walls 18 cause the tooth to slide "down to enable it to engage subsequent notches. locked condition until a tire becomes deflated and it is desired to remove the demountable rim. The catch is then released from en gagement with the rim by taking hold of the spring at the out-turned end 24% and shifting it downwardly and to oneside: as indicated in Fig. 10. Here the spring will engage the under face of the bolt at the side of the catch and the outer part of the catch which is heavier will fallso as to disengage the tooth 10 from the notches and permit the ring to slide in a reverse direction thereby enabling thezwedges to disengage themselves from the heads of the bolts. The inner notches 10 are then brought into registry with the bolt heads and the ring is slipped oif in an axial direction.

From the foregoing, it will be appreciated that the present invention produces a compact and inexpensive locking device which engages the demountable rim at all points about its circumferential edge and thus se- As this rotary motion cures the rim and tire more permanently and stably in place; at the same time the device permitting of ease and convenience in the removal and replacement of the demountable rim.

It is obvious that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and. modifications being restricted only by the scope of the following claims:

What is claimed is:

1. In combination with a wheel having a folly and a demountable rim carried thereby, of a plurality of bolts fitted transversely through the folly and having outwardly projecting heads with undercut slots,

a locking ring adapted to seat against oneside of the demountable rim and having wedge portions taking into the undercut slots and acting against the base walls thereof, and a yieldable catch carried by one of the bolts for engaging the ring, substantially as described.

2. In combination with a wheel having a felly, a demountable rim thereon, bolts carried by said felly and having outwardly projecting heads with slots therein, a ring fitted against one side of the rim and having wedge portions entering the slots in said bolt heads, a movable catch carried by one of the bolts and adapted to engage with the ring, and means for urging the catch into engagement with the ring, said means being exposed on the exterior and adapted to be moved out of operative engagementwith the catch, substantially as described. The device is thus held in a 3. In combination with a wheel having a felly, and a demountable rim thereon, bolts fitted transversely trough the telly and having outwardly turned slotted heads, one of said bolts having a catch pivoted therein provided with a beveled tooth thereon, L spring means associated with the catch for urging the tooth outwardly, said spring means engaging with the bottom portion of the catch and being exposed through the bolt and adapted to be slid from the catch sidewise onto an exterior portion of the bolt, and a flanged ring having wedge portions adapted to fit within the slotted heads of the bolts and further having notches on its inner side adapted to slide over the bolt heads, said wedge portions having an inclined series of notches adapted to receive the tooth of the catch and having abrupt walls to hold against the tooth, substantially as described.

HARRY WALTER MARTIN. LANNIE MORRIS CALHOUN, 

